Compilare: user.cpp: In function ‘int main()’: user.cpp:74:42: warning: operation on ‘cv’ may be undefined [-Wsequence-point] M[cuv[cv]+1]=cv++; ^ user.cpp: In function ‘int make(int, int)’: user.cpp:31:28: warning: ‘j’ may be used uninitialized in this function [-Wmaybe-uninitialized] return i+j-2-2*a[i-1][j-1]; ^